Patents for E21D 19 - Provisional protective covers for working space (559) |
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09/20/2005 | US6945738 Method and apparatus for safety protection of temporary roof support |
07/06/2005 | CN2707965Y I steel round butt joint shed for shaft and drift supporting |
05/25/2005 | CN1619105A Method and apparatus for safety protection of temporary roof support |
04/07/2005 | US20050073189 Method and apparatus for safety protection of temporary roof support |
09/22/2004 | CN2642995Y High-strength type plastic flat net for coal mine down-hole support |
09/22/2004 | CN2642994Y Coal mine protective united net |
08/25/2004 | CN2635920Y Anti-falling device for H-bar support of tent |
06/29/2004 | US6757642 Method for performing wedge analysis for assessing wedge instabilities in underground openings |
06/03/2004 | WO2004046508A1 Safety device for mines |
06/02/2004 | CN2619053Y Anchor rod support assist top ladder beam |
01/07/2004 | CN1133795C Sand pressure release double arch semi-enclosed support technology for soft brenk roc kmining roadway |
12/31/2003 | CN2596015Y Net for protecting mining road |
10/08/2003 | CN1123674C Supporting method for advancing in loosen and soft surrounding rock |
09/17/2003 | CN2573680Y Mine glass fibre grille canopy guard |
05/10/2002 | CA2361460A1 Method for performing wedge analysis for assessing wedge instabilities in underground openings |
05/03/2002 | CA2325177A1 Cable line stopping |
04/23/2002 | US6375390 Method for widening road, superhighway or railway tunnels, without interrupting the traffic |
03/07/2002 | WO2002018749A1 An apparatus for installing a support assembly for a rock structure |
12/04/2001 | US6325460 Machine used in connection with underground mining having an operator protective shield |
08/15/2001 | CN2443149Y Supporting net for mine |
05/01/2001 | US6224164 Mining machine with detachable articulated cutting assembly |
03/27/2001 | US6206478 Tunnel excavator with crawler drive and roof support bearing frames |
11/23/2000 | WO2000069970A1 Polymeric structural support membrane |
11/23/2000 | CA2372115A1 Polymeric structural support membrane |
10/12/2000 | DE19915939A1 Construction device for dam wall between mining face and gallery, has support stands with hydraulic rams and dismantlable shuttering walls |
08/23/2000 | CN2392913Y Plastic sheet for support for mine |
06/14/2000 | CN1053412C Mining basketry sheet braiding machine |
03/22/2000 | CN2370159Y Flexible metal rail net |
01/12/2000 | CN1240876A Supporting method for advancing in loose and soft surrounding rock |
12/02/1999 | WO1999061546A1 Method and device for consolidating the surfaces of rocky soils |
11/04/1999 | WO1999056002A1 Cable line stopping |
08/17/1999 | US5938376 Automated temporary roof support, bolter and method |
05/12/1999 | CN2318398Y Bar-mat reinforcement flexible separation false bottom |
05/05/1999 | CN1215792A Sand pressure release double arch semi-enclosed support technology for soft break rock mining roadway |
12/30/1998 | EP0887512A2 Method for widening road, superhighway or railway tunnels, without interrupting the traffic |
11/18/1998 | CN2297541Y Artificial roof plastic cloth for coal mine |
07/29/1998 | CN2286799Y Anchored net |
03/11/1998 | CN2276078Y Plastic false roof for coal mine underground |
02/25/1998 | CN2275162Y Antomatic reused jet for whitewashing materials |
02/11/1998 | CN2274256Y Machine-knitted plastic net for mining use |
10/15/1997 | CN1162058A Residue-less pillar recovering method |
09/04/1997 | DE19607629A1 Tunnel construction technique |
05/28/1997 | CN1035025C Necessary support frame before heading face |
01/08/1997 | CN2244617Y Mine roof supporting net for coal face |
12/25/1996 | CN2243536Y Pseudo-top fast connecting belt used in coal mine gallery |
12/17/1996 | US5584611 Movable load support |
11/13/1996 | CN1135566A Top-support for underground digging |
04/17/1996 | CN1120485A Mining basketry sheet braiding machine |
01/10/1996 | CN2217103Y Structure for connecting rhombus metallic net with its side of reversed rotated screw like wire |
10/18/1995 | CN2210255Y Roof type protective cover for gallery with swing joint |
08/02/1995 | CN2204334Y Front-probe support for machine-digging working-surface |
07/26/1995 | CN1105734A Necessary support frame before heading face |
06/28/1995 | CN2202183Y Flame-retarded and antistatic plastic net for coal mine |
10/12/1994 | CN1093437A Hanging equipment for temporary support and protection |
09/21/1994 | CN2177805Y Mating support for use front drifting working face |
07/27/1994 | CN2172807Y Plastic wall-protecting net for mines |
05/17/1994 | US5312206 High lift temporary roof support for mines |
04/26/1994 | US5306099 Mine tunnel support system |
03/23/1994 | CN2159454Y Hanging apparatus for temporary support |
03/02/1994 | CN1083168A Multifunctional provisional chock for galleries |
02/16/1994 | CN2156288Y Plastic screen top |
12/08/1993 | CN2148822Y Apparatus for use in drifting roof of archy gallery |
11/24/1993 | CN2147351Y Hanging device for tunnelling temporary support |
11/24/1993 | CN2147350Y Temporary roof protector for tunnel |
11/17/1993 | CN2146572Y Push-moving front cantilever |
09/16/1993 | DE4206424A1 Plant for introducing reinforcing layer under waste deposits - forms grid of drainage channels in floor of excavated layer and has movable support frame operated in area to be filled. |
06/30/1993 | CN2137289Y Temporary props used for fast rescue proping during roof fall of coal mine |
05/19/1993 | CN2133672Y Provisional support for tunnelling face |
05/19/1993 | CN1020779C Method of supporting the smectite bearing soft rock tunnel |
01/05/1993 | US5176474 Mine tunnel support systems |
11/12/1992 | DE4115518A1 Supporting roof of underground gallery - using arches connected to each other by horizontal struts |
10/20/1992 | US5156497 Temporary roof support for mines |
10/01/1992 | DE4109880A1 Protection against rock fall in mine - comprises corrugated arched plates located across gallery just under roof, fixed to sidewalls on anchored brackets |
05/13/1992 | CN1061071A Method of supporting the smectite bearing soft rock tunnel |
05/06/1992 | EP0484079A1 Improvements in and relating to mine tunnel support systems |
04/22/1992 | CN2102372U Safety frame protective barrier |
02/27/1992 | DE4026368A1 Method of successive excavation of tunnel - involves cladding face of new excavation and supporting face with gap between them |
07/10/1991 | CN2080560U Diamond metal net with side having double row net-connecting hook |
06/13/1991 | DE3940249A1 Making safe conveyor and cutting areas in mine - involves box-like staging which can be moved in phase with driving shield |
06/06/1991 | DE4011907A1 Roadway heading chamber for temporary support of mining tunnel - comprises front and rear sections with roof supports and back-filled support all carried on framework |
02/26/1991 | CA1280614C Underground mining and quarrying operation through descending stripping and undercaving, and related installation |
01/16/1991 | CN1048580A Telescopic flexible metal shield |
12/25/1990 | US4979780 Mining or underground quarrying method and installation for implementing same |
08/30/1990 | DE3906150A1 Temporary support for underground roadways |
07/05/1990 | DE3923376C1 Self propelling machine for mining coal - comprises platform supported by vertical hydraulic jacks and raking jacks |
05/17/1990 | DE3838095A1 Active face protection |
05/03/1990 | DE3902331C1 Face protection for roadway driving |
03/15/1990 | DE3828641A1 Face protection with bracing in several planes |
11/30/1989 | DE3817420A1 Heading-face protection |
09/27/1989 | CN1035866A Contractible and suspended struture supporting method |
08/24/1989 | DE3904012A1 Grubenausbau zur gewaehrleistung der bergsicherheit in grubenraeumen Mine roof to ensure the safety mountain in grubenraeumen |
08/16/1989 | CN1034782A Suntaining-network method with flexible plastic rock bolts |
07/13/1989 | DE3800046A1 Support for a crown kerf |
04/05/1989 | CN2035384U Net-shaped articulated cap |
02/22/1989 | CN2033056U Metal net for spraying anchor support |
11/03/1988 | DE3813905A1 Roadway driving chamber for the temporary support of a roadhead in underground mining |
08/03/1988 | CN87201589U Portable hydraulic network connector |
06/15/1988 | CN85205290U Automatic protective system for thick coal seam slice mining |
12/23/1987 | EP0250286A1 Underground mining process using downwardly directed stoping and caving, and installation for carrying this out |
12/01/1987 | US4710064 Movable roof support and bolter system |